John h



J. H. BELL.

SYNCHRONIZING SYSTEM.

APPLICATION FILED MAYI, 1920 Patented Aug. 23, 1921.

Mrentor John H Be/l Z 64214 y 'flflorney UNITED STATES PATENT OFFICE.

'Jonn E BELL, or soon: ORANGE, New JERSEY, ASSIGNOR r0. WESTERN ELECTRIG COMPANY,.- INCORPORATED, OF NEW YORK.' i

To all whom it may concern: I Be it known that I, JOHN H. BELL, a citizen of the United States, residing at South Oran e, in the county of Essex, State of New ersey, have invented certain new and useful Improvements in V Synchronizing Systems, of which the following is a full, clear, concise,an'd exact description.

This invention relates to synchronizing systems and particularly to synchromzing indicatingmeans for use in printing telegraph systems.

The principal object the provision of eflicient and reliable indicat ing means which will give an indication require the utilization of one or more reing 'synchronismof two or more driving ceiving printers. It is customary in securmotors in a multiplex printer installation,

to use one station asthe pace-settingstation and transmit from that station toanother, a

naling: impulses representing a group of si particular (iliaracter and observe atthe' receiving station whether the character transmitted is recordedat the receiving station,or

whether another or other characters are recorded. F or; example, the-operator at the sending or pacesetting station, may trans mit signals representing the character 0, which, according to-the Baudot code, is represented by five impulses If the printer at the receiving or corrected station records the character 0 repeatedly, then it is clearly evident that the sending and receiving f distributers are in synchronism. However, if the receivin printer records,

C the character M, which-gis" represented by five impulses of then it will be evident that the receiving distributeriis traveling in advance of the sending distributer the equivalent of one segment. On the other hand, if the receivingprinter records, instead of the character C, the character U, which is repres'ented by'five impulses of it will indicate that the receiving distributer is lagging with'respec't to the sendingdis Application filed May 1, 1920. Serial No. 378,159

of this invention is YORK, N. Y., A CORPORATION OF NEW srncnnomzrne SYSTEM. 7

J Specification of Letters Patent. Patented Aug. 23, 192 1. I I

tributerthe equivalent of one segment. The

operator at the receiving station must then adjust the receivi g distributer face or brushes so that the transmitted impulses are properly received; However, the receiving d stributer may be nlsm with respect to the sending distributer that it may be diificult to tell the relative phase displacement and it may be impossible to tell Which Way the distributer face or brushes should be shifted or oriented in order to bring the distributers in synchronism with the least possible delay. Fur thermore, it is sometimes desirable .to have the operating tables on which the receiving printers areplaced some distance from the distributer tables on which the driving motor and impulse distributers are located.

Ilnder such conditions it is difficult and at t mes practically impossible-to observe the difference in speedof the sending and receivlng'distributers by means of the characters recorded by the receiving same time adjust the receiving distributer in orderto bring it into synchroni'sm with the sending distributer at the pace-setting station.

It is the purpose of this invention to overcome such difliculties by providing suitable indicating means associated with the distributing apparatus without relying upon the receiving printers so that the difference in speed of the distributers at thecorrectin and corrected stations may be observed and adjusted with a negligible amount of delay.

The above and other objects of' this invention willbe fully set forth in the following description' and claims and will be more readily understood by-reference to the accompanylng drawing in which the pre ferred embodiment of the invention is disclosed diagrammatically. In the attached drawing, the sending, receiving and local distributer brush arms are shown mounted on a singleshaft 31 driven by a synchronous motor or phonic wheel 30. While a phonic wheel of the La Cour type is shown, it is to be understood-that any other suitable driving'means may be provided. The sending printer and at the ling circuits. through a bank or group oit', particular lamp will :berlighted iintermitmitter T, which may be of the keyboard or switch 35 is now thrown to connect the lamp automatic type, both of which are well circuits to the segments of the receiving disknown in the .art. It is .to be understood --tributer and if the receiving distributer is intliat si nilar transmittingimeans may be consynchronism WI-[$111116 sending distributer nected to each of the other distributor quadan energizing circuit will be completed'from rants. The receiving distributer R; like the grounded battery 52, armature 51, receiving distributer S, is illustrated comprising a con ring 53, distributor brush 5%, segment, 55,

tinu'ous' ring and a segmented ring 01": which switch member 56, contact 57, through "the the segments are arrangediin fourgroups 01,- especi-allv designatedlamp 1 to ground. If five segments each. The segments of each the two dlstributers are in exact synchroquadrant of the {receivingdistributer ,are \nism, the lamp 1 will belighted intermit.

normally connected to receiving magnets in, tently or oncefor each revolution of the disk suitable recording instruments fore2rample gtributer, brush; arm. e 011311116 other. handy printers as indicated by: the character, l?.;,-In-.- however, at tliegireceiving-rdlstributer; 1s not cluded in the circuits extending from, therm in synchronism-i With-the .distributer-at the ceivingdistributer segments areiswitch mem-,, pace-setting station, then "onehof the-other; bers controlled by a gangswitchfio,whereby 19 lamps will beghgatediduring each revolu+ thereceivmg circuits may, be ClISGQIIDGQtQQlJtlOIL If the corrected and COI'IQC EHIgpClIS Q from the selecting magnets of therecordin device P and connectedto contacts'control- -chronlsm, and 11011111 ,synchronism ithena g 1 t ,tributers 1 are; traveling 1115111118011 or in i n lamps numbered 1 110 20 inclusive, onelamp tentlyor once during each revolutionbi' the V of which maybe. dist nguished from the res, recelv ng distributer- However, if :the ore-.

maining 19by any suitable means such asa ,ceiving distributer; is noti-rotatingnin-qiso red orv green reflector cap 1n; the IlIaW1ng,-Cl1I"0111Sm witl1, tl1e.sencl1ng CllStI'lbLltBI'yfiIlCl this special lamp; is indicated at Both: is either lagging oraleadingwith respect toe the sendingand receiving distributors are, the?'otheredistributer,rthen a diii'erenti'lamp; provided with a handle or vextensiol fii by c-,may be lightediateachrevolutionnndanine; means of which either distributer face or :dication will thereby; beiigivienawhether them.

distributerbrush arm may be shiftedor-ori receiving? distributen is running faster aorv ented n, order to bring the said distributer slowen-thanpthe send1ng distrlbuter, that 11s,

intosynchronism withthe distributor at;the the direction in which the lampsare sequen:

pace-setting station The' local 'distributer tially lighted willind-icate iwhich distributor C is provided with a continuous ring and a is running thezfaster of thelt WOA lfany: one,

segmented ring commonly employed fonthe particular lamp other than the especially i purpose of controlling local ,operati ons, as sdesignated lamp, is lighted repeatedly, it will, for instance, the operation of a printing, indicate the-degreeof orientation through magnet in the receiving printers P,'or the which the; receiving distributer. should be operation .of a tape-feeding magnet. of the turned in order to.bringthetwoistationsiins transmitters T. v synchronism. Assumingthat the; lamp 5, is

The driving motor 30 may, if desired,- be lighted repeatedly instead of lamp 1, then I operated and controlled byline current imthereceiving operatorhwill, by, meansof the pulses as disclosed in Patent #1,185,712, A handle 34, orient theglteceiving distributer the? dated J une 6, 1916. Since the drivingimechextent of five segments orguntiltheespecially: 'anlsm formsno part of the present inven designated lamp :is repeatedly-lighted and:

tion, ;a detailed description thereof is unthen by operating or shifting the gang,"

necessary.

switch 35, thecharacter signals may he di: N ow let it be assumed that a distant starected-to-theselectlng mechanism: of there-.

tion is acting as the pace-setting station andceiving recorders and both? stations ,maya;

that there is provided at the distantstation v then send andreceiveat wilL-y suitable transmltting, and sending apparatus such, forvexalnple, as illustrated at T and S group or banlr of lamps indicated in the at, of the attached drawlngyalso assume thattached-drawing, may be'located or positionedthe operator atthe (IllStfLIlhStfLtlOlliS8l1ClS.I'G-- on the;distributorv table iniclose. proximity,

peatedly the character E which is repree with the synchronousv (1.181311111111818; ZLIIClEthGE: sented by five mpulses of receiving printers may-bedisoonnectedfrom;

current, from a single transmitter.untilthe the line and bedis'regarded entirely until-the operator at the IGOQlViIlgDr correctedstadistributersarebrought-into:synchronism w tion has brought his distributer intosynas indicatedrby the signal-indicatingmeans Whatjs claimed is;

chronism withthe distant station. --There-.

1. A synchronizing systemgcomprisinga fore, theifirst impulse received over the line L being a positive impulse,will operate-the correcting station, andfa correctedstatioma i linerelay 50 to move lts armature 51 into currentimpulse;.distribllteratgsaid correct engagement with the lower contact connecting station, a current impulse distributeriat 1130;

ed to grounded battery 52, and if the gang the corrected station, a recording mechanism at the corrected station adapted to be associated with the said current impulse distributer, means at the corrected station for indicating the relative phase displacement of said current impulse distributer's, and means for connecting the indicating means to and disconnecting the recording mechanism from the current impulse distributer.

2. A synchronizing system comprising a correcting station and a corrected station, a current impulse distributer at said correcting station, a line circuit, a current impulse distributer at the corrected station, recording mechanism at the corrected station adapted to be connected to the said current impulse distributer, a group of lamps responsive to line signals for indicating the relative phase displacement of said current impulse distributers, and means for connecting the group of lamps to and disconnecting the recording, mechanism from the current impulse distributers.

3. A synchronizing system comprising a correcting station and a corrected station, a current impulse distributer at said correcting station, a line circuit, a current impulse distributer atthe corrected station, recording mechanism at the corrected station adapted to be connected to the said current impulse distributer, a group of lamps responsive to line signals for indicating when the said current impulse distributers are in synchronism, and means for connecting the group of lamps to and disconnecting the recording mechanism from the current impulse distributer. V

4. A synchronizing system comprising a correcting station and a corrected station, a current impulse distributer at said corrected station, recording mechanism at the corrected station normally associated with the said current impulse distributer, means at the corrected station for indicating the relative phase displacement of said current impulse distributers, switching means for connecting the indicating means to and disconnecting the recording mechanism from the current impulse distributer, and means for orienting the distributer at the corrected station for bringing said distributers into synchronism.

In witness whereof, I hereunto subscribe my name this 17th day of April, A. D. 1920.

JOHN H. BELL. 

